change_zabbix.sh

#!/bin/bash

function checkRoot {
    if [ "$EUID" -ne 0 ]
    then echo 請使用root帳號，或sudo指令執行
        return 1
    fi
    return 0
}
checkRoot || exit

config_file=/etc/zabbix/zabbix_agentd.conf

if [ -f $config_file ]
then
    old_hostname=`egrep '^Hostname=(.*)' /etc/zabbix/zabbix_agentd.conf | sed 's/^Hostname=\(.*\)/\1/g'`
    old_server=`egrep '^Server=(.*)' /etc/zabbix/zabbix_agentd.conf | sed 's/^Server=\(.*\)/\1/g'`

    echo "原有監控名稱為$old_hostname，監控端主機為$old_server"
else
    echo '原本未監控，請先安裝監控套件zabbix，使用指令"yum install -y zabbix-agent"'
    exit
fi

new_hostname=
new_server=
read -p "請輸入新的監控名稱，或者不修改維持現狀( $old_hostname ): " new_hostname
read -p "請輸入新的監控主機IP，或者不修改維持現狀( $old_server ): " new_server
if [ ! -z "$new_server" ]
then
    old_server=$new_server
fi

function validIp {
    IFS='.'
    ip=$1

    cnt=0
    for i in $ip
    do
        test $i -le 255 2> /dev/null || return 1
        ((cnt++))
    done
    return `test $cnt -eq 4`
}

test ! -z "$new_server" && (validIp "$new_server" || (echo "不合要求的ip" ; exit 1))

test ! -z "$new_hostname" && sed -i "s/^Hostname=\(.*\)/Hostname=$new_hostname/g" $config_file
test ! -z "$new_server" && sed -i "s/^Server=\(.*\)/Server=$new_server/g" $config_file && sed -i "s/^ServerActive=\(.*\)/ServerActive=$new_server/g" $config_file

read -p "更新完成，是否立刻重啟zabbix服務? (y/n)" restart
test "$restart" == 'y' && systemctl restart zabbix-agent && echo 重啟完成
test "$restart" == 'y' && systemctl status --no-pager zabbix-agent

sleep 1
echo "執行完畢，請繼續至監控端主機( $old_server )完成監控設定。"